摘要
采用磷酸、硫酸对榴莲壳进行化学改性后低温碳化可制备高性能的榴莲壳基介孔碳(DSPC),研究其对水中甲基橙(MO)的吸附性能。采用物理吸附仪测定材料的孔结构,混酸活化12 h,碳化温度400℃时,DSPC的比表面积为1620 m^(2)/g,总孔容为1.42 cm^(3)/g,孔径为3.5 nm,当吸附温度为25℃,其对MO的最大吸附量可达326.6 mg/g。吸附过程遵循准二级动力学模型,符合Freundlich吸附等温模型,为自发进行的物理吸热过程。FTIR结果表明,通过化学改性法制备的DSPC表面含有甲基、亚甲基和甲氧基等基团,可能提高DSPC对MO的吸附能力。该研究实验原料安全易得,制备工艺简单节能,所得DSPC吸附容量大,可实现工业化。
High-performance durian shell-based mesoporous carbon(DSPC)is prepared by low-temperature carbonization of durian shell after chemical modification with phosphoric acid and sulfuric acid,and its adsorption performance for methyl orange(MO)in water is studied.The pore structure of the material is determined by physical adsorption instrument.When the mixed acid is activated for 12 h and the carbonization temperature is 400℃,the specific surface area of DSPC is 1620 m^(2)/g,the total pore volume is 1.42 cm^(3)/g,and the pore size is 3.5 nm.When the adsorption temperature is 25℃,the maximum adsorption capacity of MO is 326.6 mg/g.The adsorption process follows the pseudo-second-order kinetic model,conforms to the Freundlich adsorption isotherm model,and is a spontaneous physical endothermic process.FTIR results show that the surface of DSPC prepared by chemical modification contains methyl,methylene and methoxy groups,which may improve the adsorption capacity of DSPC for MO.The experimental raw materials are safe and easy to obtain,the preparation process is simple and energy-saving,the obtained DSPC has a large adsorption capacity,and can be industrialized.
作者
贾双珠
李长安
刘品祯
杨光黎
吴秋云
朱俊霞
赵爽
JIA Shuangzhu;LI Chang'an;LIU Pinzhen;YANG Guangli;WU Qiuyun;ZHU Junxia;ZHAO Shuang(College of Chemistry and Chemical Engineering,Qiannan Normal University for Nationalities,Duyun 558000,China)
出处
《河南化工》
2025年第10期24-27,42,共5页
Henan Chemical Industry
基金
贵州省教育厅科技拔尖人才项目(黔教技[2022]095号)
黔南民族师范学院高层次人才研究项目(2021qnsyrc05)
贵州省(国家级)2023大学生创新项目(202310670046)
贵州省高等学校工程研究中心(黔教技[2023]046)
贵州省高等学校科技创新团队(黔教技[2023]090)资助。
关键词
榴莲壳
多级孔碳
甲基橙
吸附
动力学
durian shell
hierarchical porous carbon
methyl orange
adsorption
dynamics
